I would dearly love to be able to blame a seven-point decline in children’s IQ scores on COVID lockdowns, but a lot of things happened in this country between 2012 and 2020. Ubiquitous smartphones. Social media. A decline in free play that long predates the pandemic. Changes in education itself, including the narrowing and politicizing of curricula and an ever increasing focus on test-taking. Demographic change, which it’s impolite to mention in this context, but if you’re going to talk about change from one generation to the next, you need to make sure you’re comparing children with their own parents, at least in the aggregate.
In any case, if you’re inclined to think that kids these days are a bunch of dumbasses, you now have data to back you up.